Dwyer Series RHP-EW Humidity Transmitter Controller
Dwyer RHP-EW combines humidity sensing with PID control output for process applications like pharmaceutical drying rooms. It automatically maintains humidity setpoints by modulating humidifiers or exhaust fans based on real-time RH measurements. Classified under HTS 9032.89.60.70 for humidity process control instruments.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If functioning solely as a hygrometer without control outputs
Hygrometers measuring humidity without regulation classified in 9025 per Chapter 90 structure
If programmable logic controllers with humidity I/O for factory automation
PLCs with process control functions classify in 8537 as boards for specific functions
If replacement control modules, not complete instruments
Parts suitable for use solely with 9032 instruments classify in 9033 per Chapter 90 Note 2(c)
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Import Tips & Compliance
• Provide PID control algorithm specifications proving automatic stabilization per Chapter 90 Note 7
• Label as 'process control instrument' not 'transmitter only' to prevent 9031 misclassification
• Watch for country-of-origin marking on sensor components; Chinese assemblies often need detailed BOM
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